Description
LORD 4688 A/B is a two-component modified epoxy syntactic foam system. It is used to reinforce honeycomb core and other hollow structures where low density and high compressive strength are required. The mixed product has a thixotropic, paste-like consistency suited for trowel or injection application. This listing is for the gallon kit format, suited for higher-volume use.
Key Product Details
| Property | Value |
|---|---|
| Chemistry | Modified epoxy syntactic foam |
| SKU | 3003740 |
| Package Size | Gallon kit |
| Form | Paste |
| Color, Part A | Pink |
| Color, Part B | Blue |
| Mixed Color | Brown |
| Viscosity, Part A | Thixotropic paste |
| Viscosity, Part B | 50 cps |
| Mixed Viscosity | Thixotropic |
| Mix Ratio | 100 parts A to 11 parts B |
| Working Time | 30 minutes at 24°C |
| Set Time | 1 hour |
| Cure Cycle | 24 hours at 24°C, or 3 hours at 75°C |
| Specific Gravity | 0.45 g/cm3 (28.4 lbs/ft3) |
| Compressive Strength (R.T.) | 3,500 psi |
| Compressive Strength (-320°F) | 8,000 psi |
| Tensile Shear (R.T.) | 2,000 psi |
| Tensile Shear (-320°F) | 1,500 psi |
| Outgassing TML (ASTM E-595) | 0.52% |
| Outgassing CVCM (ASTM E-595) | 0.01% |
| Flash Point | Greater than 125°C |
| Shelf Life | 6 months in original unopened containers, stored in clean dry conditions |
Performance in Production
- Thixotropic mixed consistency holds position during trowel or injection application without sagging.
- 30-minute working time supports careful placement across larger fills or multi-point application.
- Two cure options: 24 hours at room temperature, or 3 hours at 75°C for faster cycle time.
- Very low specific gravity (0.45 g/cm3) contributes minimal weight to the assembly.
- Low outgassing per ASTM E-595 (TML 0.52%, CVCM 0.01%).
- Color-coded components support visual mix confirmation when batch-mixing from bulk containers.
Common Applications
- Honeycomb core reinforcement
- Hollow structure reinforcement
- Trowel or injection-applied void filling
- Higher-volume low-density structural foam applications
- Applications requiring low outgassing per ASTM E-595
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